Is our brain a computer? Are we able to understand the brain? What is consciousness? Do algorithms think? Is mathematics omnipotent? Can it generate works of art? Can we calculate the Mandelbrot fractal? Do bicycle wheels draw fractals? What may aliens be like? Could we communicate with aliens? Why is the theory of relativity incomprehensible? Is "the twin paradox” really a paradox? What do we need complex numbers for? Is number 1 unique? To get the answers, I would like invite readers to my book.